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  • Alfred Wegener came up with the theory of the continental drift. In 1912 he noticed that if you were to push all the continents together that they would fit like a puzzle, and he found different fossils on other continents that don't live there anymore. He called it Pangea.
  • When tectonic plates fault its is called transform. It starts when tension pulls apart a divergent boundary. Then the two boundaries start to shear. when they can't push towards each other anymore the slid which is called strike-slip.
  • This is called convergent, it is when the oceanic crust is pushed down by the continental crust. Since the oceanic crust is more dense than the continental crust that is will slid underneath it, which is called subduction. 
  • when the seafloor spreads apart it is called divergent. The mid-atlantic ridge is a good example of where this happens. When the seafloor spreads magma comes up from the mantle and creates a new seafloor. Due to the magma coming out, it makes convection currents. 
  • Earthquakes are scaled to how much big its is. We use the richter scale which trangulates earthquakes. Earthquakes start in the epicenter. When earthquakes happen there are two different types of waves the P-waves and the S-waves. We use the seismograph to locate where the seismic waves are.
  • There are three different types of volcanos. They are The shield, cider cone, and composite. Volcanos like the composite are explosive but the shield volcano just has lava running down the sides and they are nonexplosive. The ring of fire is a major area in the basin of the Pacific Ocean where volcanos like to erupt and there are a lot earthquakes.
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